Relic isn't going to remake the whole game, you shouldn't be asking for or expecting that to happen.
You're right, they aren't going to redesign anything. But the thread asked about diversifying the meta, and a redesign is the only real way to do it; everything else is just a bandaid on a problem that isn't going to go away.
You can patch the game and make different units viable, but at the end of the day you're still stuck with a game that has very little in the way of interesting strategic options, and a game that lacks that sort of depth is always going to settle down into a fairly stale metagame.